On Fri, Sep 22, 2023 at 02:51:41PM +0530, Prashanth K wrote:
> From: Hongyu Xie <[email protected]>
>
> [ Upstream commit 808925075fb750804a60ff0710614466c396db4 ]
>
> irq is disabled in xhci_quiesce(called by xhci_halt, with bit:2 cleared
> in USBCMD register), but xhci_run(called by usb_add_hcd) re-enable it.
> It's possible that you will receive thousands of interrupt requests
> after initialization for 2.0 roothub. And you will get a lot of
> warning like, "xHCI dying, ignoring interrupt. Shouldn't IRQs be
> disabled?". This amount of interrupt requests will cause the entire
> system to freeze.
> This problem was first found on a device with ASM2142 host controller
> on it.
>
> [tidy up old code while moving it, reword header -Mathias]
>
> Cc: [email protected]
> Signed-off-by: Hongyu Xie <[email protected]>
> Signed-off-by: Mathias Nyman <[email protected]>
> Link: https://lore.kernel.org/r/[email protected]
> Signed-off-by: Greg Kroah-Hartman <[email protected]>
> ---
> drivers/usb/host/xhci.c | 34 +++++++++++++++++++++-------------
> 1 file changed, 21 insertions(+), 13 deletions(-)
What stable kernel(s) are you asking this to be applied to?
greg k-h
On 22-09-23 04:00 pm, Greg Kroah-Hartman wrote:
> On Fri, Sep 22, 2023 at 02:51:41PM +0530, Prashanth K wrote:
>> From: Hongyu Xie <[email protected]>
>>
>> [ Upstream commit 808925075fb750804a60ff0710614466c396db4 ]
>>
>> irq is disabled in xhci_quiesce(called by xhci_halt, with bit:2 cleared
>> in USBCMD register), but xhci_run(called by usb_add_hcd) re-enable it.
>> It's possible that you will receive thousands of interrupt requests
>> after initialization for 2.0 roothub. And you will get a lot of
>> warning like, "xHCI dying, ignoring interrupt. Shouldn't IRQs be
>> disabled?". This amount of interrupt requests will cause the entire
>> system to freeze.
>> This problem was first found on a device with ASM2142 host controller
>> on it.
>>
>> [tidy up old code while moving it, reword header -Mathias]
>>
>> Cc: [email protected]
>> Signed-off-by: Hongyu Xie <[email protected]>
>> Signed-off-by: Mathias Nyman <[email protected]>
>> Link: https://lore.kernel.org/r/[email protected]
>> Signed-off-by: Greg Kroah-Hartman <[email protected]>
>> ---
>> drivers/usb/host/xhci.c | 34 +++++++++++++++++++++-------------
>> 1 file changed, 21 insertions(+), 13 deletions(-)
>
> What stable kernel(s) are you asking this to be applied to?
>
> greg k-h
Need this patch on v5.15, I had cc'ed "[email protected] # 5.15", but
looks like it didn't work. Should I resend this with SOB and CC tags?
Thanks,
Prashanth K